This recipe looks like it will be interesting as written and as a great way to use up leftover seasoned meat that is/was already fully cooked.

Pretzel Bao With Sweet Sesame-Hot Mustard Pork Recipe was included with a list of “Game Day” suggestions from Serious Eats

Most “store brand” Stone Ground or Dijon brown mustard – offered 12 oz squeeze bottles are pretty much the same. Either makes a good base for different condiment needs. (sandwich spread, dipping, glazing, etc)

Wheat’s Hot-n-Spicy Mustard Dip
3 Tbl Stone Ground Mustard
1 tsp Horse Radish POWDER
….. or 1 TBL Prepared Horse Radish
3 Tbl Water or other liquid to thin to dipping consistency
– Mix well and allow to sit at room temp for a few hours OR overnight in fridge
– Store, covered in refrigerator up to 3 weeks.

Although I will use most of their recipe for the ingredients and the technique, as of those with chronic arthritis, the dough for this recipe could easily be prepared using the dough cycle of your Bread Machine – Just remember to follow your machine’s recommendations for the order in which to add ingredients. My suggestion/rule of thumb for things like sourdough and in this case, the tangzhong is after other liquid

So far the only sub I will make is using a comparable amount of previously prepared shredded pork that needs to leave the freezer and used. It only slightly differs from the recipe in that it was modified to avoid certain ingredients which do not sit well with us. Just the first of what I suspect will be many experiments.